#solver-button {
  background-image: url('data:image/svg+xml,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%20192%20192%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cpath%20d%3D%22M71.182%20138.872l27.077%2027.077H8.002v-18.051c0-19.947%2032.312-36.103%2072.205-36.103l17.058.993-26.083%2026.084m9.025-117.333c19.939%200%2036.103%2016.164%2036.103%2036.103s-16.164%2036.103-36.103%2036.103S44.105%2077.58%2044.105%2057.641s16.163-36.102%2036.102-36.102z%22%20fill%3D%22%23ff9f43%22%2F%3E%3Cpath%20fill%3D%22%2327ae60%22%20d%3D%22M171.362%2098.256l12.636%2012.726-58.938%2059.479-31.319-31.589%2012.636-12.727%2018.683%2018.774%2046.302-46.663%22%2F%3E%3C%2Fsvg%3E');
  background-color: transparent;
  background-position: center;
  background-repeat: no-repeat;
  background-size: 32px 32px;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  opacity: 0.8;
  cursor: pointer;
}

#solver-button:focus,
#solver-button:hover {
  opacity: 1;
}

#solver-button:focus {
  outline: none;
}

#solver-button.working {
  background-image: url('data:image/svg+xml,%3Csvg%20width%3D%2244%22%20height%3D%2244%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20stroke%3D%22%23727272%22%3E%3Cg%20fill%3D%22none%22%20fill-rule%3D%22evenodd%22%20stroke-width%3D%225%22%3E%3Ccircle%20cx%3D%2222%22%20cy%3D%2222%22%20r%3D%221%22%3E%3Canimate%20attributeName%3D%22r%22%20begin%3D%220s%22%20dur%3D%221.8s%22%20values%3D%221%3B%2020%22%20calcMode%3D%22spline%22%20keyTimes%3D%220%3B%201%22%20keySplines%3D%220.165%2C%200.84%2C%200.44%2C%201%22%20repeatCount%3D%22indefinite%22%2F%3E%3Canimate%20attributeName%3D%22stroke-opacity%22%20begin%3D%220s%22%20dur%3D%221.8s%22%20values%3D%221%3B%200%22%20calcMode%3D%22spline%22%20keyTimes%3D%220%3B%201%22%20keySplines%3D%220.3%2C%200.61%2C%200.355%2C%201%22%20repeatCount%3D%22indefinite%22%2F%3E%3C%2Fcircle%3E%3Ccircle%20cx%3D%2222%22%20cy%3D%2222%22%20r%3D%221%22%3E%3Canimate%20attributeName%3D%22r%22%20begin%3D%22-0.9s%22%20dur%3D%221.8s%22%20values%3D%221%3B%2020%22%20calcMode%3D%22spline%22%20keyTimes%3D%220%3B%201%22%20keySplines%3D%220.165%2C%200.84%2C%200.44%2C%201%22%20repeatCount%3D%22indefinite%22%2F%3E%3Canimate%20attributeName%3D%22stroke-opacity%22%20begin%3D%22-0.9s%22%20dur%3D%221.8s%22%20values%3D%221%3B%200%22%20calcMode%3D%22spline%22%20keyTimes%3D%220%3B%201%22%20keySplines%3D%220.3%2C%200.61%2C%200.355%2C%201%22%20repeatCount%3D%22indefinite%22%2F%3E%3C%2Fcircle%3E%3C%2Fg%3E%3C%2Fsvg%3E') !important;
  opacity: 1;
}
